Insulated disconnect switch with fuse, Panel mounting, Cable terminals: bridge (S) 50-185 mm2 RBK 1 Un: 690 V~ In: 250 A 63-811779-011

Fuse isolation switch – reliable installation protection

This fuse isolation switch, designed for panel mounting, is a key element in electrical power distribution systems. It provides effective protection of electrical equipment against the effects of short circuits and overloads by cooperating with industrial NH1 type fuse cartridges. The device is characterized by a solid construction and high parameters, which guarantees its reliability and long-term operation.

Features and application

The RBK 1 isolator with a rated current of 250A and a voltage of 690V is an ideal solution for both professional installers and end users. The possibility of mounting on a plate and a wide range of cable lugs (50-185 mm²) facilitate its integration with various installations. Bridge terminals provide convenient and secure connection of wires. The device has a protection class of IP20, which means protection against touching with fingers and solid bodies larger than 12.5 mm.

Advantages in practice

• High reliability: Rated short-circuit current Iq at 100 kA provides effective protection against the effects of sudden surges.
• Universal mounting: Possibility of mounting on a plate facilitates integration with existing distribution boards and control cabinets.
• Wide range of applications: Designed to work with NH1 fuse cartridges, making it compatible with many standard protection systems.
• Safety of use: IP20 protection class minimizes the risk of electric shock and damage to the device by solid bodies.
• Solid construction: Made of high-quality materials, guarantees durability and resistance to environmental conditions.
• Easy status identification: Measuring holes allow visual control of the fuse cartridge status without the need to disassemble the isolator.

Technical parameters in detail

The RBK 1 isolator is distinguished by the following parameters:

• Rated continuous current (Iu): 250 A – ensures safe operation of the installation under continuous load.
• Rated operating voltage (Ue): 690 V – enables use in high-voltage installations.
• Rated conditional short-circuit current (Iq): 100 kA – guarantees effective protection against the effects of short circuits.
• Type of main contact connection: Cable lug – ensures secure and durable connection of wires.
• Number of poles: 3 – enables use in three-phase circuits.
• For fuse cartridges: NH1 - standard industrial fuse cartridge

The device is intended for operation in rooms not containing dust, corrosive or explosive gases, at an altitude of up to 2000 m above sea level, as well as outdoors in enclosures with an appropriate degree of protection (IP34 or higher). The ambient temperature should be in the range of -25°C to +55°C, and the relative humidity of the air should not exceed 50% at a temperature of +40°C.